Providing a web site at which users can offer goods for sale and buy goods offered by others; Providing a web site where users can post ratings, reviews and recommendations on products and services; Providing a web site whereby buyers of goods or services locate and receive quotations from multiple competitive sources and sellers of goods or services identify and bid on multiple new sales opportunities; Providing a web site which features advertisements for the goods and services of others on a global computer network; Providing an on-line computer web site that provides commercial financial transaction data, account management, financial reporting, accounting features and related reference information; Providing space at a web site for the advertisement of the goods and services of others; Provision of a web site featuring information on shopping; Rental of advertising space on web sites; The bringing together, for the benefit of others, of a variety of goods and services, enabling customers to conveniently view and purchase those goods and services from an Internet web site particularly specializing in the marketing of the sale of goods and services of others